Engine-stop mechanism.



E. H. BRISTOL.

ENGINE STOP MECHANISM.

APPLICATYON FlLD SEPT. 19, 1910.

1,174,226. Patented Mar. 7,1916.

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WW Edgar Hliristol BY I 6m m I ATTORNEYS PH co WASHINGTON. D. c.

are STATES PATENT FIC [EDGAR H. BRIsTon or NAUGATUCK, 'oonnncriounnssienon TQTTHETNDTTSTRIATL INSTRUMENT COMPANY, or wnrnnsunnconnncricur, A coRromTIo o-rco-n- 'NECTIOU'I.

To all whom itfmay concern: Be-lt known that I, EDGAR H. BRISTOL, a

citizen of theUnited'States, and a resident of'N'augatuck, in the county of New Haven, State of Connecticut, haveinvented anImprovement in Engine-Stop Mechanisms, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the This-invention relates to new and useful improvements in engine stop mechanisms, and has for its object, among otherthings, to provide means whereby an engine 'may be stoppedjreadily from different stations if desired.

The-character of this invention may be best understood by reference to one practical embodiment shown for illustration in the accompanying drawings, in wh1ch Figure 11s a front elevation of a governor mechanismembodying the invention; Fig. 2'

is a side elevation thereof; Fig. 3 is a detail horizontal section on a line 33 of Figs. and 2; Fig. 4 is an enlarged detail of parts shown in Fig. 2; and Fig. 5 is a detached detail hereinafter explained.

Referring to the drawings, the governor post 1 has mounted thereon a ball governor of the usual type comprising a fixed collar 2, a sliding collar 3,ball rods 4: connected with the fixed collar 2 at one end and toth'e sliding collar 3 by the-links 5, and the balls 6 secured to the rods 4.- A rock shaft 8 is journaled in a bracket 7 and has an arm 9 fixed thereon, which is connected; with the valve mechanism (not shown) for admitting steam to the steam chest,by the valve rod 10. Loose on said rock shaft is an arm 11 having a weight 12 adjustably mounted" thereon, and the arm 13 to which is connected one end of the rod 14' that'has a laterally projecting pin-15' in its other end. This pin projects into a cam slot'16 in one side-of the governor post, and by its movement therein actuates the rock shaft 8. The governor rod is preferably made in two normal conditions.

drawings representing l1ke parts. I

.EneINn-sTor ivrEcr ANIsivr.

are shown'in the relative positions occupied by them when the engine is running under v If by reason of-varia tion in the load, or for any other cause, the speed .of the engine is increased, the balls 6 of the governor-swing outwardly, thereby raisingthe collar 3, and through the gover. ,nor rod connection, the cam-pin 15, which 7 pin will move upwardly in the camslot 16 and actuate the Valve mechanism through the arin9, rock shaft 8 and valve rod' 10, shutting off some of. the-steam supply and decreasing. the speed of the engine until 15 will return toits original position. If the speed ncreases to such an 1 extent that the pin 161s-br011ght to the top of the cam slot 'l6'the steam supply will be entirely shut off .in Fig. 2, when the enginewill automati- Specification of Letters Patent. t Patented Mar. 1916. Application filed September 19, 1910. SeriaINo. 582,623. V

' itreturns to its normal'speed,when the pin cally startup again. If'the governor mech- 4 anism-should'break, the collar 3, aided by the weighted lever 11, willmove' the governor rod downwardly so that the pin 15 will drop to the bottom of the slot 16, at which time the steam supply is entirely shut off. Thevalue of this mechanism is its ability to automatically control the speed of the engine, and-it is one of the objects of my invention to utilize this device by adding means thereto to automatically stop the en'- gine from any one of a number ofplaces located at a distancefrom the engine itself.

.To this end the two-partgovernor rod re- 7 ferred to isprovided with a coupling device including a sleeve 24 (see Figs. 3 and 4) connected to the lower section 18 of said governor rod and adapted to receive thelower end of the upper'section "17 of said governor rod. This upper section 17 may be detachably 'r'etained'in said sleeve by alatch 25,

pivoted at one end to lateraliears 26 integral with said sleeve, and through a transverse slot in said sleeve normally entersa notch 27 (Fig. 5) in said upper section 17 and thereby couples the sections 17 and 18 to-.

gether. The latch'25 is normally retained in this position against the resistance of a spring 28 by the hook end 29 of a trip lever 30 fulcrumed between its ends on a lateral arm 31 integral with said sleeve. 'To release this lever and thereby permit the latch to fly out into the position shown in dotted lines in Fig. 3, the opposite end of said lever may constitute an armature 32 which may be attra'cted by a-coilmagnet 33mountedon an ,arm t also integralfwith said'sleeve. This magnet is connected by wires 35 to a battery 36 and may beexcited at will by'jopemng and closing the electric circuit by any one of a plurality of -push buttons 37 (Fig 3),

.,result is accomplished. by, pressing any one 0f the push buttons 37, which closes the electric circuit, thereby exciting said coil and attracting the armature. of the lever 30, rocking the latter and releasing its hook enda29 from the .latch25, the latter being drawn out of ,the slot 27 bythe spring 28. As soon as. the latch is disengaged from the notch 27, whichdisengagement is facilitated by the angular sides :27 thereof, the governor rod section 18 drops ofits own weight,

aided by the weighted lever 11.

- It will be understood that my invention is not limited to the particular embodiment shown herein, but that various modifications may be made without departing from thespirit of my invention.

Claims:

1. A stop mechanism. for engines comprising, in combination, a governor; cam means having steam varying and stop portions; follower means cooperating'with the latter for connection with the engine valve; means connecting said follower means with said governor including separable members; means detachably connectingsaid members; and. means for moving said follower from said steam varying portion of said cam to the stop portion thereof on separation of said members.

2. A stop'mechanism forengines compris-.-

and 18; a camway 16, a pin 15 cooperating with said camway and connected to the member 18, coupling means d'etachably connecting said members and an arm 11' and weight 12 tending to move said pin 15 toward the bottom of the cam 16 to close the valve and stop the engine.

3. A stop mechanism for enginescomprising, in combination, a governor; means connecting said governor to the engine valve including separable members; .a sleeve bracket fast on one of said members and adapted to receivethe'other; a latch pivoted to said bracket having provision for locking said members together; spring means tend ingto open said latch; a magnet and an armature trip member pivoted on said bracket and adapted to release said latch to said spring on the energization of said magnet. I

4. A stop mechanism for engines comprising in combination, a governor, .a guide having steam varying and stop portions, a follower movable along said guide, a weighted arm tending to move said follower into said stop portion, separable members connecting said governor with said follower,-and means detaohably connecting said members having provision forseparating the latter to permit said weight'to move said follower from said steam varying portion to said stop portion for operating the. valve of the engine to arrest the latter.

5. A stop mechanism for engines comprising in combination, a governor, a guide having steam varying and stop portions, a. follower movable along said guide, means tending. to move said follower into said stop portion, separable members connecting said governor with said follower, and means detacha-bly connecting said members having provision for separating the latter to permit said means to move said follower from said steam varying portion to said stop portion for operating the valve of the engine to arrest the latter.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

EDGAR BRISTOL. lVitnesses LAUREN EA. JANNnY, VVA'rsoN E. GOODYEAR.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Pate ts,

Washington, D. G.

It is hereby certified that Letters Patent No. 1,174,226, granted March 7, 1916 upon the application of Edgar H. Bristol, of Naugatuck, Connecticut, for an improvement in Engine-Stop Mechanisms, were erroneously issued to The Industrial Instrument Company, of Waterbury, Connecticut, a corporation of Connecticut, Whereas said Letters Patent should have been issued to The Forboro Company, of Foxboro, Massachusetts, a corporation of Massachusetts, as ass'ignee, by mesne assignments, of the entire interest in said invention, as shown by the record of assignments in this office; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Ofiice.

Signed and sealed this 18th day of April, A. D., 1916.

' R. F. WHITEHEAD,

Acting Commissioner of Patents.

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